You can apply for a Tier 1 (Investor) visa if:
Your funds must be:
Your money can be in the UK or overseas when you apply.
Accelerated route to permanent residence by increased investment amounts
On April 6, 2011, the Government announced new rules which provide the ability to achieve Indefinite Leave to Remain in the UK (ILR), which is permanent residence, through an accelerated route. The new requirement is an increased investment. An investment of GBP 10 million or more will provide for settlement after two years, and an investment of GBP 5 million or more will provide for settlement after three years, instead of the usual five years. It is important to know that only the main applicant will have his/her route to permanent residence fast tracked through higher level of investment; their dependents (spouse and children) can only apply for permanent residence after living for 5 years in UK.